FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 112

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

FDD Interface Pins
All pins in the FDD interface which can be
connected directly to the floppy disk drive itself
are either DISABLED or TRISTATED.
Table 45 - State of Floppy Disk Drive Interface Pins in Powerdown
MOTEN[0:3]
DRATE[0:1]
FDD Pins
WRDATA
DSKCHG
DENSEL
RDATA
DS[0:3}
HDSEL
DRV2
STEP
TRK0
INDX
WP
DIR
WE
Pins
Output Pins
Input Pins
State in Auto Powerdown
112
used for
programming are unaffected. Table 47 depicts
the state of the floppy disk drive interface pins in
the powerdown state.
Tristated
Tristated
Tristated
Tristated
Active
Active
Active
Active
Active
Input
Input
Input
Input
Input
Input
local
logic
control
or
part